// This file originates to a work of Mathias Panzenböck, portable_endian.h, of
// which he puts in public domain.
//
// License text was as next.
//
// "License": Public Domain
// I, Mathias Panzenböck, place this file hereby into the public domain.  Use
// it at your own risk for whatever you like.  In case there are jurisdictions
// that don't support putting things in the public domain you can also consider
// it to be "dual licensed" under the BSD, MIT and Apache licenses, if you want
// to.  This code is trivial anyway.  Consider it an example on how to get the
// endian conversion functions on different platforms.

#pragma once

#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) &&                 \
    !defined(__WINDOWS__)

#define __WINDOWS__

#endif

#if defined(__linux__) || defined(__CYGWIN__)

#include_next <endian.h>

#elif defined(__APPLE__)

#include <libkern/OSByteOrder.h>

#define htobe16(x) OSSwapHostToBigInt16(x)
#define htole16(x) OSSwapHostToLittleInt16(x)
#define be16toh(x) OSSwapBigToHostInt16(x)
#define le16toh(x) OSSwapLittleToHostInt16(x)

#define htobe32(x) OSSwapHostToBigInt32(x)
#define htole32(x) OSSwapHostToLittleInt32(x)
#define be32toh(x) OSSwapBigToHostInt32(x)
#define le32toh(x) OSSwapLittleToHostInt32(x)

#define htobe64(x) OSSwapHostToBigInt64(x)
#define htole64(x) OSSwapHostToLittleInt64(x)
#define be64toh(x) OSSwapBigToHostInt64(x)
#define le64toh(x) OSSwapLittleToHostInt64(x)

#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN

#elif defined(__OpenBSD__)

#include <sys/endian.h>

#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)

#include <sys/endian.h>

#ifndef be16toh
#define be16toh(x) betoh16(x)
#define le16toh(x) letoh16(x)
#endif

#ifndef be32toh
#define be32toh(x) betoh32(x)
#define le32toh(x) letoh32(x)
#endif

#ifndef be64toh
#define be64toh(x) betoh64(x)
#define le64toh(x) letoh64(x)
#endif

#elif defined(__WINDOWS__)

#include <winsock2.h>
#include <sys/param.h>

#if BYTE_ORDER == LITTLE_ENDIAN

#define htobe16(x) htons(x)
#define htole16(x) (x)
#define be16toh(x) ntohs(x)
#define le16toh(x) (x)

#define htobe32(x) htonl(x)
#define htole32(x) (x)
#define be32toh(x) ntohl(x)
#define le32toh(x) (x)

#define htobe64(x) htonll(x)
#define htole64(x) (x)
#define be64toh(x) ntohll(x)
#define le64toh(x) (x)

#elif BYTE_ORDER == BIG_ENDIAN

/* that would be xbox 360 */
#define htobe16(x) (x)
#define htole16(x) __builtin_bswap16(x)
#define be16toh(x) (x)
#define le16toh(x) __builtin_bswap16(x)

#define htobe32(x) (x)
#define htole32(x) __builtin_bswap32(x)
#define be32toh(x) (x)
#define le32toh(x) __builtin_bswap32(x)

#define htobe64(x) (x)
#define htole64(x) __builtin_bswap64(x)
#define be64toh(x) (x)
#define le64toh(x) __builtin_bswap64(x)

#else

#error byte order not supported

#endif

#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN

#else

#error platform not supported

#endif
